bronchiole

例句：

1. 1.The lungs are made up of many bronchioles and alveoli.
   肺部由许多支气管和肺泡组成。
2. 2.Bronchioles are small tubes that connect the air sacs in the lungs to the blood vessels.
   支气管是连接肺部空气囊与血管的细小管道。
3. 3.Inhaling air through the nose helps to clear the bronchial tubes, which can be blocked by mucus.
   通过鼻子吸入空气有助于清理支气管，这些支气管可能被黏液堵塞。